Anthropic's Alex Albert shares tips for Claude Fable 5.2: hand it whole projects for hours

alexalbert__ · x · 2026-11-10

Anthropic's Alex Albert says Claude Fable 5.2 is a major step above Opus 5.5 on big open-ended work, with practical tips: ask it to critique your idea before building, start at med/high effort saving xhigh for the hardest problems, state upfront what needs approval, and hand it a whole project to run for hours. The quoted post is the official launch of Claude Fable 5.2 and Mythos 5.2, targeting daunting technical challenges with gains in coding, reasoning, and vision.

Related event: Fable 5.2 Wins Praise for Open-Ended Tasks(2 posts)→

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